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【简答题】
监测某采样点大气中的氮氧化物时,用装有5 mL吸收液的筛板式吸收管采样,采样流量为0.30 L.min -1 ,采样时间为60 min,采样后用光度法测定并计算得知全部吸收液中含2.0 μg NO 2 ,已知采样点的温度为5°C,大气压为100 Kpa,求大气中二氧化氮的含量.
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举一反三
【简答题】['sɪmpəθi] n. 同情;同情心
【单选题】He treasured a notebook in which ______ his bank account password and his friend’s addresses.
A.
wrote
B.
were recorded
C.
was written
D.
wrote
【单选题】Important () his discovery might be, it was regarded as a matter of no account in his time.
A.
when
B.
until
C.
as
D.
although
【单选题】When judging his performance, dont take his age______account.
A.
for
B.
into
C.
at
D.
to
【单选题】Important _____ his discovery was ， it was regarded as a matter of no account in his time .
A.
to
B.
for
C.
as
D.
although
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